Have you ever tried to obtain a handgun in Canada? The 1996 Firearms Act made it harder but not impossible. My Mother in Law, a school teacher, had little difficulty obtaining a 9mm Glock for "personal protection and target practice." She lives in downtown Ottawa near the Rideau canal and Parliement.
Do you understand that the Authorization to CARRY is different from the ability to OWN? Many people in Canada OWN handguns, but very few may CARRY them on their person.
You are correct on shotgun capacity laws. Pumps are unlimited to the best of my knowledge in all provences. You will find that Parliment has passed many gun laws since 1996 that have not been applied in all provences....Consult you local bi-law office or RCMP for clarification. In parts of Ontario it is still a maximum capacity of 10rds,....even though "provential law" states 5 rds for autos and higher for pumps. I had no problem obtaining and using a magazine extension for the 835 that brought maximum capacity to 8 2.75" shells when I was in Kapuskasing. There was a recent documentary on APTV about whale/seal hunting. If you watch it you will see that nearly every person has a hi-cap mag in a mini14 or mini30, or a shotgun with a tube.
If you do your homework you will find where some of the Aboriginal groups, the provence of Alberta (back in 1996 and again in 2001), and the Nunavut peoples have all recently challenged the Canadian Supreme court of the right of Parliement to inact gun laws.
In many of the rural areas of Northern Canada you will find few gun laws ACTUALLY exist.(i.e. are inforced) I carried a .44mag SRH openly for years without a permit and was only once asked about it by a RCMP officer. He asked if I had a permit. I said "no, I am a bear guide". He said, "oh, eh...ye ever had to used dat ting?"
You are correct on 2+1 for capacity for migratory bird hunting. That is pretty much anywhere in Canada or the USA.
You are correct on the many differences in provence to provence regs for shotgun only deer hunting, and it varies even more in how it is enforced and by whom.
In a nutshell, this is just like any other gun law. You have to double and triple check your facts and then make sure they apply in your specific area, and your intended operation.
So, back to the original poster, you should have little trouble obtaining a magazine tube extension for a PUMP shotgun, if you so choose, for bear protection.
T2E